C/2002 B3 (LINEAR)
| Parameter |
Value |
| Designation |
C/2002 B3 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2002-01-16T16:07:23.381760Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:14Z |
| Obs used |
50 |
| NEO |
- |
| M1 |
7.800 |
| K1 |
10.000 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2002-02-11.0000000 |
| e |
1.00544039 |
| q (au) |
6.056174 |
| a (au) |
-1113.188016 |
| i (deg) |
73.690348 |
| Ω (om, deg) |
289.364950 |
| ω (w, deg) |
123.136749 |
| M (ma, deg) |
0.000672 |
Magnitude
Scatter + Global Linear
$$
M_a = (10.937 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
10.937 |
| n |
2.000 |
| gf |
0.910 |
| gb |
-0.500 |
| k |
1.000 |
| δ90 |
7.444 |
| Parameter |
Symbol |
Range |
Description |
| Absolute magnitude at 1 AU from Sun and Earth |
H0 |
-5 to 20 |
Intrinsic brightness of the comet |
| Photometric slope parameter |
n |
2 to 6 |
Rate of brightness change with heliocentric distance |
| Forward scattering asymmetry factor |
gf |
0.8 to 1 |
Degree of forward scattering |
| Backward scattering asymmetry factor |
gb |
-1 to -0.5 |
Degree of backward scattering |
| Partitioning coefficient |
k |
0.8 to 1 |
Ratio between forward/backward scattering contributions |
| Dust-to-gas brightness ratio |
δ90 |
1 to 10 |
Relative contribution of dust scattering to gas emission |
Reference: EPSC-DPS2025-160
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-02-03 00:00 |
08:17:31.11 |
-56:24:23.4 |
HIP 40821 |
21.91 |
| 2026-02-03 12:00 |
08:17:26.22 |
-56:24:16.0 |
HIP 40821 |
22.47 |
| 2026-02-04 00:00 |
08:17:21.33 |
-56:24:08.3 |
HIP 40821 |
23.04 |
| 2026-02-04 12:00 |
08:17:16.46 |
-56:24:00.2 |
HIP 40821 |
23.61 |
| 2026-02-05 00:00 |
08:17:11.59 |
-56:23:51.7 |
HIP 40821 |
24.18 |
| 2026-02-05 12:00 |
08:17:06.74 |
-56:23:42.9 |
HIP 40821 |
24.76 |
| 2026-02-06 00:00 |
08:17:01.90 |
-56:23:33.7 |
HIP 40821 |
25.33 |
| 2026-02-06 12:00 |
08:16:57.07 |
-56:23:24.1 |
HIP 40821 |
25.91 |
| 2026-02-07 00:00 |
08:16:52.26 |
-56:23:14.2 |
HIP 40821 |
26.50 |
| 2026-02-07 12:00 |
08:16:47.45 |
-56:23:03.9 |
HIP 40821 |
27.08 |
| 2026-02-08 00:00 |
08:16:42.66 |
-56:22:53.3 |
HIP 40821 |
27.66 |
| 2026-02-08 12:00 |
08:16:37.89 |
-56:22:42.3 |
HIP 40821 |
28.25 |
| 2026-02-09 00:00 |
08:16:33.12 |
-56:22:30.9 |
HIP 40363 |
28.58 |
| 2026-02-09 12:00 |
08:16:28.37 |
-56:22:19.2 |
HIP 40363 |
28.36 |
| 2026-02-10 00:00 |
08:16:23.64 |
-56:22:07.2 |
HIP 40363 |
28.15 |
| 2026-02-10 12:00 |
08:16:18.92 |
-56:21:54.8 |
HIP 40363 |
27.96 |
| 2026-02-11 00:00 |
08:16:14.22 |
-56:21:42.0 |
HIP 40363 |
27.80 |
| 2026-02-11 12:00 |
08:16:09.53 |
-56:21:28.9 |
HIP 40363 |
27.65 |
| 2026-02-12 00:00 |
08:16:04.86 |
-56:21:15.4 |
HIP 40363 |
27.53 |
| 2026-02-12 12:00 |
08:16:00.21 |
-56:21:01.6 |
HIP 40363 |
27.43 |
| 2026-02-13 00:00 |
08:15:55.58 |
-56:20:47.5 |
HIP 40363 |
27.36 |
| 2026-02-13 12:00 |
08:15:50.96 |
-56:20:33.0 |
HIP 40363 |
27.31 |
| 2026-02-14 00:00 |
08:15:46.36 |
-56:20:18.2 |
HIP 40363 |
27.28 |
| 2026-02-14 12:00 |
08:15:41.78 |
-56:20:03.0 |
HIP 40363 |
27.27 |
| 2026-02-15 00:00 |
08:15:37.21 |
-56:19:47.5 |
HIP 40363 |
27.29 |
| 2026-02-15 12:00 |
08:15:32.67 |
-56:19:31.6 |
HIP 40363 |
27.33 |
| 2026-02-16 00:00 |
08:15:28.15 |
-56:19:15.4 |
HIP 40363 |
27.39 |
| 2026-02-16 12:00 |
08:15:23.65 |
-56:18:58.9 |
HIP 40363 |
27.48 |
| 2026-02-17 00:00 |
08:15:19.16 |
-56:18:42.1 |
HIP 40363 |
27.59 |
| 2026-02-17 12:00 |
08:15:14.70 |
-56:18:24.9 |
HIP 40363 |
27.72 |
| 2026-02-18 00:00 |
08:15:10.26 |
-56:18:07.4 |
HIP 40363 |
27.87 |
| 2026-02-18 12:00 |
08:15:05.85 |
-56:17:49.5 |
HIP 40363 |
28.04 |
| 2026-02-19 00:00 |
08:15:01.45 |
-56:17:31.4 |
HIP 40363 |
28.24 |
| 2026-02-19 12:00 |
08:14:57.08 |
-56:17:12.9 |
HIP 40112 |
28.36 |
| 2026-02-20 00:00 |
08:14:52.73 |
-56:16:54.1 |
HIP 40112 |
27.82 |
| 2026-02-20 12:00 |
08:14:48.40 |
-56:16:35.0 |
HIP 40112 |
27.29 |
| 2026-02-21 00:00 |
08:14:44.10 |
-56:16:15.5 |
HIP 40112 |
26.77 |
| 2026-02-21 12:00 |
08:14:39.82 |
-56:15:55.8 |
HIP 40112 |
26.26 |
| 2026-02-22 00:00 |
08:14:35.57 |
-56:15:35.7 |
HIP 40112 |
25.76 |
| 2026-02-22 12:00 |
08:14:31.34 |
-56:15:15.3 |
HIP 40112 |
25.27 |
| 2026-02-23 00:00 |
08:14:27.13 |
-56:14:54.7 |
HIP 40112 |
24.80 |
| 2026-02-23 12:00 |
08:14:22.95 |
-56:14:33.7 |
HIP 40112 |
24.34 |
| 2026-02-24 00:00 |
08:14:18.80 |
-56:14:12.4 |
HIP 40112 |
23.90 |